CN202721200U - Plastic-metal composite shell for lithium battery - Google Patents
Plastic-metal composite shell for lithium battery Download PDFInfo
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- CN202721200U CN202721200U CN2012201712531U CN201220171253U CN202721200U CN 202721200 U CN202721200 U CN 202721200U CN 2012201712531 U CN2012201712531 U CN 2012201712531U CN 201220171253 U CN201220171253 U CN 201220171253U CN 202721200 U CN202721200 U CN 202721200U
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- plastic
- lithium battery
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- metal composite
- composite shell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a plastic-metal composite shell for a lithium battery. The plastic-metal composite shell for the lithium battery comprises a plastic shell, wherein a metal layer is attached to the inner surface of the shell, is 0.05-0.5 millimeters in thickness, is jointed on the inner surface of the shell in a film plating, bonding or hot pressing way, and is an alloy foil sheet or thin slice made of any one or a combination of any of aluminum, nickel, copper or stainless steel; and the shell is 0.1-8 millimeters in thickness, and is made of a material made from any one or a combination of any of ABS (Acrylonitrile Butadiene Styrene), PP (Polypropylene), PVC (Polyvinyl Chloride), PE (Polyethylene) or PTFE (Polytetrafluoroethylene). Due to the adoption of the plastic-metal composite shell for the lithium battery disclosed by the utility model, the mass of the shell is reduced, the cost is lowered, water molecule permeation or electromagnetic interference can be prevented, the durability and safety of the lithium battery are enhanced, domestication is realized easily, and the high yield and lower cost are achieved in a production process.
Description
Technical field
The utility model relates to a kind of li battery shell, especially a kind of plastic-metal composite shell of large-capacity power type poly-lithium battery, this power lithium battery can be used for various large-capacity high-power mobile devices, for example electric bicycle, battery-operated motor cycle, electrocar, electric bus, electric yacht, satellite communication machine, drone, rocket launcher and submarine communication power supply etc.
Background technology
The large-capacity power type li battery shell of prior art has following several form:
Metal shell: for example stainless steel case or aluminum hull.Its shortcoming is that 1. weight is larger, affects the weight energy density of battery; 2. battery cover board is when laser seal welding, and rate of finished products is lower, and scrappage is higher, aluminum-shell battery especially, and when laser seal welding, it is more that the phenomenons such as fried fire, quick-fried point occur, and higher battery scrappage has increased material cost and production cost; 3. the electric insulation of metal shell is comparatively complicated and difficult, and the ambroin film of overcoat is damaged under the complex road condition of electric motor car easily, causes the battery pack of plural serial stage to be leaked electricity at high voltage end; 4. comparatively rigidity and hard, particularly stainless steel casing of metal shell, when battery was blasted, when safety valve had little time to open, the power of battery explosion was huge, and metal shell damages the person and article just as shell fragment, and battery security is relatively poor.
Plastic housing: shells such as acrylonitrile-butadiene-styrene (ABS) plastics (ABS) or polypropylene plastics (PP).If make li battery shell with ABS plastic, because its density is very little, only has 1.05g/cm
3, can't block water molecule penetrating for the battery shell wall.It is suitable using in the electrolytical lead-acid battery of water system, when in the lithium battery of non-water system, using, and when hydrone penetrates and diffuses in the no water electrolyte, lithium hexafluoro phosphate LiPF wherein
6Will with the biochemical reaction of steeping in water for reconstitution, produce hydrofluoric acid and hydrogen, cause battery bulging and electrode corrosion.
The density of material of PP polypropylene plastics is also very little, only has 0.1g/cm
3Even, highdensity PP polypropylene plastics, its density also only has 1.1g/cm
3, can't the block water molecule penetrate.When hydrone penetrates and diffuses in the no water electrolyte of lithium battery, lithium hexafluoro phosphate LiPF wherein
6Will with the biochemical reaction of steeping in water for reconstitution, produce hydrofluoric acid and hydrogen, cause battery bulging and electrode corrosion.In fact, with the Metal Phase ratio, the density of nearly all plastic material is all less, uses plastics as li battery shell, and the bulging that causes lithium battery that penetrates of hydrone is long and short problem of time.
In addition, adopt plastic casing, also have the problem of electromagnetic interference.Lithium ion battery is a resistance, electric capacity and inductance mixed body, can externally produce electromagnetic radiation during battery pack work, and the electronic circuit around the battery pack is produced very strong disturbing effect.
The lithium battery flexible packaging shell: the thickness of the aluminum plastic composite membrane that existing lithium battery flexible packaging adopts only has the 0.1-0.25 millimeter, and plastic-aluminum combined film is frivolous and soft, and bulging and distortion occur battery easily.On the other hand, soft plastic-aluminum combined film does not have mechanical strength, is punctured easily, scuffing, squeeze crack or be damaged under other External Force Acting, and particularly the weight of large-capacity power type lithium battery is larger, the use road conditions of electric motor car are complicated, and plastic-aluminum combined film is more prone to break and damage.Battery is restricted with aluminum plastic composite membrane sources of supply in addition, need to be from Japanese import.The whole world only has two Japanese firms to have the ability to produce the lithium battery aluminum-plastic composite membrane.Although domestic many raw material suppliers drop into ample resources, carry out many research and development and development work, still, domestic aluminum-plastic composite membrane can only be used for the food and medicine packaging bag, its quality can't arrive the technological requirement that li battery shell is used, and all technical and japanese product differ greatly.Because supply is limited, the price of import aluminum-plastic composite membrane, quality, delivery date etc., many factors were uncontrollable.Therefore, aluminum-plastic composite membrane is not good selection for large-capacity power lithium battery.
The utility model content
The utility model embodiment technical problem to be solved is: the plastic-metal composite shell that a kind of novel lithium battery is provided, to alleviate the housing quality, to reduce cost, simultaneously can prevent that hydrone from penetrating and electromagnetic interference, improve fail safe and durability that lithium battery uses, easily production domesticization.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of plastic-metal composite shell of novel lithium battery, the plastic-metal composite shell of described lithium battery comprises the housing of plastic cement material, also has metal level on the inner surface of described housing.
Further, described housing comprise body and lid and on body and with the cover plate that body is tightly connected, all depended on metal level on the inner surface of body and cover plate.
Further, described housing is provided be used to the electrode hole that electrode is set and is used for arranging the decompression valve opening of pressure-reducing valve or is used for injecting electrolytical liquid injection hole.
Further, the thickness of described metal film is 0.05～0.5mm.
Further, described metal level is to be incorporated on the inner surface of housing with plated film, bonding or hot pressing mode.。
Further, the thickness of described housing is 0.1～8mm.
The beneficial effect of the utility model embodiment is: the plastic-metal composite shell of the lithium battery of present embodiment has significantly reduced the weight of shell owing to adopt the composite shell of plastics and metal, has saved production cost.
In addition, this plastic-metal composite shell can prevent that hydrone from penetrating because its metal level is located on the inner surface of plastic casing, makes whole shell have good intensity, and not bulging distortion; And its plastic housing physical efficiency is resistance to worn, resist chemical, and has the function of high-insulativity, anti-high-pressure electrostatic and electric leakage, anti-electromagnetic interference, has improved fail safe and durability that lithium battery uses.
The more important thing is that this plastic-metal composite shell can domesticize, broken advanced country to Chinese High-tech outlet monopolization, be conducive to the fast development of lithium battery national industry.
Below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
Description of drawings
Fig. 1 is the cutaway view of the plastic-metal composite shell of the utility model embodiment lithium battery.
Embodiment
As shown in Figure 1, the utility model embodiment provides a kind of plastic-metal composite shell of lithium battery, and it comprises housing 1 and metal level 2.
Described housing 1 is the housing of hollow, housing 1 adopts plastic cement material to make, such as common or highdensity acrylonitrile-butadiene-styrene (ABS) plastics (ABS), polyamide-66(nylon 66), the materials such as polypropylene plastics (PP), polyvinyl chloride (PVC), vinyon (PE) or polytetrafluoroethylene (PTFE); The thickness of housing 1 is 0.1～8 millimeter.
Described housing 1 comprises body 11 and cover plate 12, and body 11 and cover plate 12 cover and adopt the Ultrasonic Plastic Welding technology to carry out seal welding mutually, and the speed of welding is fast, efficient is high, do not have bad welding phenomena to occur.Also be provided with on the described housing 1 be used to the electrode hole 13 that electrode is set with for the decompression valve opening 14 that pressure-reducing valve is set, perhaps described decompression valve opening 14 also can be used to injecting electrolytical liquid injection hole.
Described metal level 2 depends on the inner surface of described housing 1, and it can adopt the plating of vacuum coating, water power, bonding or heat pressing process to be located on the inner surface of described housing 1.
When adopting the technique of vacuum coating, the material of metal level 2 can aluminium, nickel, copper or any several alloy wherein, and the thickness of metal level 2 is 0.05～0.5 millimeter.The method of vacuum coating has: vacuum vapor plating, vacuum sputtering coating or vacuum magnetron sputtering coating film etc.
When adopting the technique of water power plating (plastic chemistry plated film), the material of metal level 2 can aluminium, nickel, copper, chromium, stainless steel or any several alloy, and the thickness of metal level 2 is 0.05～0.5 millimeter.
When adopting the adhesion technique of polymeric membrane or bonding agent, the material of metal level 2 can aluminium, nickel, copper, stainless steel or wherein arbitrarily paillon foil or the thin slice of several alloys, with this paillon foil or the slice forming metallic sheath box for adapting with housing 1 inside dimension, described polymeric membrane can be the materials such as crosslinked polypropylene (CPP); Bonding agent can be selected synthetic resin or epoxy resin.Adopt hot pressing, cold pressing or the mode of normal temperature and pressure, preformed metallic sheath box by polymeric membrane and bonding agent, is bonded on the inner surface of housing 1.
When adopting heat pressing process, the material of metal level 2 can aluminium, nickel, copper, stainless steel or wherein paillon foil or the thin slice of any several alloys, the metallic sheath box that this paillon foil or slice forming are adapted for the inside dimension with housing 1, because the fusing point of paillon foil is more high than fusing point or the softening point of housing 1, adopt the mode of hot pressing, described preformed metallic sheath box is hot bonding on the inner surface of housing 1.
The first application form of the plastic-metal composite shell of the lithium battery of the utility model embodiment, it is applied to the lithium battery of capacity 150Ah, and the mode that it uses vacuum coating is coated with the metal level 2 of aluminium matter at the inner surface of ABS plastic housing 1.Because the proportion 1.09g/cm of ABS plastic
3, the proportion of aluminium is 2.7g/cm
3, the wall thickness of housing 1 is 3 millimeters, and metal level 2 thickness of aluminium matter are 0.08 millimeter, and the total weight of the plastic-metal composite shell of the composite lithium ion battery of this ABS and aluminum metal layer is 405 grams.The lithium battery of the 150Ah rectangle ternary material compared to existing technology, because the lithium battery of this ternary material uses stainless steel casing, its overall dimension is 53x143x233mm
3The stainless steel casing wall thickness is 1.5mm, and the weight of this stainless steel casing is 1387 grams, and the plastic-metal composite shell of described the first application form is more lightweight about one kilogram than described stainless steel casing, in the time of battery case weight saving, also saved great amount of cost; The composite shell of this ABS and aluminum metal layer also has high-insulativity, anti-high-pressure electrostatic and electric leakage, higher fail safe, the advantage of the aspects such as higher qualification rate in the production process.
The second application form of the plastic-metal composite shell of the lithium battery of the utility model embodiment, it is applied to the lithium battery of capacity 200Ah, it adopts housing 1, utilize bonding process that preformed aluminum metal cover box is bonded in the inner surface of the housing 1 of nylon-66 plastic material by epoxy resin adhesive, because nylon-66 plastic proportion 1.15g/cm
3, the proportion of aluminum metal is 2.7g/cm
3, the wall thickness of housing 1 is 3 millimeters, and aluminum metal paillon foil thickness is 0.1 millimeter, and the total weight of the plastic-metal composite shell of this nylon 66 and aluminium foil composite lithium ion battery is 560 grams.The lithium battery of the 200Ah rectangle ferric phosphate compared to existing technology, because the lithium battery of this ferric phosphate uses stainless steel casing, its overall dimension is 73x163x253mm
3, the stainless steel case wall thickness is 1.5mm, the weight of this stainless steel casing is 1873 grams, the plastic-metal composite shell of described the second application form than stainless steel casing joint light about 1300 grams, in the time of weight saving, also saved great amount of cost; The plastic-metal composite shell of this nylon 66 and aluminium foil composite lithium ion battery also has high-insulativity, anti-high-pressure electrostatic and electric leakage, higher fail safe, the advantage of the aspects such as higher qualification rate in the production process.
Because the proportion (density) of metal material is larger, nickel, copper, stainless steel are 8.9g/cm
3About, and the proportion of plastics (density) is less, is about 1g/cm
3About, the metal level 2 on housing 1 inner surface only has 0.1 millimeters thick, accounts for 6% of housing 1 cumulative volume.Thus estimation, the weight of the shell that the plastic-metal that the plastic-metal composite shell of the lithium battery of the utility model embodiment adopts is compound only has 15～30% of metal shell weight, can effectively promote the weight energy density of battery.In addition, the compound shell of plastic-metal can satisfy lithium battery prevent that hydrone from penetrating, having mechanical strength, non-bulging, resistance to wear, resist chemical, high-insulativity, anti-high-pressure electrostatic and electric leakage, higher fail safe, have that electro-magnetic screen function, easily production domesticization, the supply of material are not limit, higher qualification rate in the production process and low-cost etc. many technology and commercial aspect requirement.
The above is embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection range of the present utility model.
Claims (6)
1. the plastic-metal composite shell of a lithium battery, it is characterized in that: the plastic-metal composite shell of described lithium battery comprises the housing of plastic cement material, on the inner surface of described housing also with metal level.
2. the plastic-metal composite shell of lithium battery as claimed in claim 1 is characterized in that: described housing comprise body and lid and on body and with the cover plate that body is tightly connected, all depended on metal level on the inner surface of body and cover plate.
3. the plastic-metal composite shell of lithium battery as claimed in claim 1 is characterized in that: described housing is provided be used to the electrode hole that electrode is set and is used for arranging the decompression valve opening of pressure-reducing valve or is used for injecting electrolytical liquid injection hole.
4. the plastic-metal composite shell of lithium battery as claimed in claim 1, it is characterized in that: the thickness of described metal level is 0.05～0.5mm.
5. the plastic-metal composite shell of lithium battery as claimed in claim 1 is characterized in that: described metal level is to be incorporated on the inner surface of housing with plated film, bonding or hot pressing mode.
6. such as the plastic-metal composite shell of each described lithium battery in the claim 1 to 5, it is characterized in that: the thickness of described housing is 0.1～8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201712531U CN202721200U (en) | 2012-04-19 | 2012-04-19 | Plastic-metal composite shell for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201712531U CN202721200U (en) | 2012-04-19 | 2012-04-19 | Plastic-metal composite shell for lithium battery |
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| CN202721200U true CN202721200U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201712531U Expired - Fee Related CN202721200U (en) | 2012-04-19 | 2012-04-19 | Plastic-metal composite shell for lithium battery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113601A (en) * | 2013-02-25 | 2013-05-22 | 广东欧珀移动通信有限公司 | Metal and plastics adhering method |
| CN103280542A (en) * | 2013-04-01 | 2013-09-04 | 宜兴奕润新能源科技有限公司 | Lithium iron phosphate cell |
| CN105428561A (en) * | 2014-09-17 | 2016-03-23 | 三星Sdi株式会社 | Secondary battery |
| CN107026280A (en) * | 2015-10-07 | 2017-08-08 | Sk新技术株式会社 | Lithium secondary battery |
| CN108059834A (en) * | 2017-12-19 | 2018-05-22 | 大连理工常州研究院有限公司 | A kind of battery cell case material with fire protecting performance |
| CN110391361A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Housing material of soft-package battery and preparation method thereof and wrapping film and soft-package battery |
| CN110391357A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Housing material of soft-package battery and preparation method thereof and wrapping film and soft-package battery |
| CN110391359A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Battery housing material, battery external package casing, preparation method and battery |
| CN110391362A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Battery housing material, battery external package casing, preparation method and battery |
| CN113994529A (en) * | 2019-08-12 | 2022-01-28 | 宝马股份公司 | Housing, battery cell and method for producing a housing for a battery cell |
-
2012
- 2012-04-19 CN CN2012201712531U patent/CN202721200U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113601A (en) * | 2013-02-25 | 2013-05-22 | 广东欧珀移动通信有限公司 | Metal and plastics adhering method |
| CN103113601B (en) * | 2013-02-25 | 2015-01-07 | 广东欧珀移动通信有限公司 | Metal and plastics adhering method |
| CN103280542A (en) * | 2013-04-01 | 2013-09-04 | 宜兴奕润新能源科技有限公司 | Lithium iron phosphate cell |
| CN103280542B (en) * | 2013-04-01 | 2015-09-23 | 蒋美娣 | A kind of ferric phosphate lithium cell |
| CN105428561A (en) * | 2014-09-17 | 2016-03-23 | 三星Sdi株式会社 | Secondary battery |
| CN107026280A (en) * | 2015-10-07 | 2017-08-08 | Sk新技术株式会社 | Lithium secondary battery |
| CN108059834A (en) * | 2017-12-19 | 2018-05-22 | 大连理工常州研究院有限公司 | A kind of battery cell case material with fire protecting performance |
| CN110391361A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Housing material of soft-package battery and preparation method thereof and wrapping film and soft-package battery |
| CN110391357A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Housing material of soft-package battery and preparation method thereof and wrapping film and soft-package battery |
| CN110391359A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Battery housing material, battery external package casing, preparation method and battery |
| CN110391362A (en) * | 2018-04-19 | 2019-10-29 | 北京国能电池科技股份有限公司 | Battery housing material, battery external package casing, preparation method and battery |
| CN113994529A (en) * | 2019-08-12 | 2022-01-28 | 宝马股份公司 | Housing, battery cell and method for producing a housing for a battery cell |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20210419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |